CN113899754A - Screen wrinkle degree detection method and visual detection equipment - Google Patents

Screen wrinkle degree detection method and visual detection equipment Download PDF

Info

Publication number
CN113899754A
CN113899754A CN202111360140.6A CN202111360140A CN113899754A CN 113899754 A CN113899754 A CN 113899754A CN 202111360140 A CN202111360140 A CN 202111360140A CN 113899754 A CN113899754 A CN 113899754A
Authority
CN
China
Prior art keywords
light
screen
folding screen
degree
spot
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202111360140.6A
Other languages
Chinese (zh)
Inventor
刘亚丽
贾永臻
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
Original Assignee
Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd filed Critical Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
Priority to CN202111360140.6A priority Critical patent/CN113899754A/en
Priority to PCT/CN2021/133129 priority patent/WO2023087356A1/en
Priority to US17/621,241 priority patent/US20240027362A1/en
Publication of CN113899754A publication Critical patent/CN113899754A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T7/00—Image analysis
    • G06T7/0002—Inspection of images, e.g. flaw detection
    • G06T7/0004—Industrial image inspection
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/88—Investigating the presence of flaws or contamination
    • G01N21/95—Investigating the presence of flaws or contamination characterised by the material or shape of the object to be examined
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/01—Arrangements or apparatus for facilitating the optical investigation
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T7/00—Image analysis
    • G06T7/0002—Inspection of images, e.g. flaw detection
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T7/00—Image analysis
    • G06T7/60—Analysis of geometric attributes
    • G06T7/64—Analysis of geometric attributes of convexity or concavity
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/30—Measuring arrangements characterised by the use of optical techniques for measuring roughness or irregularity of surfaces
    • G01B11/303—Measuring arrangements characterised by the use of optical techniques for measuring roughness or irregularity of surfaces using photoelectric detection means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/30—Measuring arrangements characterised by the use of optical techniques for measuring roughness or irregularity of surfaces
    • G01B11/306—Measuring arrangements characterised by the use of optical techniques for measuring roughness or irregularity of surfaces for measuring evenness
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/01—Arrangements or apparatus for facilitating the optical investigation
    • G01N2021/0106—General arrangement of respective parts
    • G01N2021/0112—Apparatus in one mechanical, optical or electronic block
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/88—Investigating the presence of flaws or contamination
    • G01N21/8806—Specially adapted optical and illumination features
    • G01N2021/8829—Shadow projection or structured background, e.g. for deflectometry
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/88—Investigating the presence of flaws or contamination
    • G01N21/95—Investigating the presence of flaws or contamination characterised by the material or shape of the object to be examined
    • G01N2021/9513—Liquid crystal panels
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T2207/00—Indexing scheme for image analysis or image enhancement
    • G06T2207/30—Subject of image; Context of image processing
    • G06T2207/30108—Industrial image inspection
    • G06T2207/30121—CRT, LCD or plasma display

Abstract

The invention provides a screen wrinkle degree detection method and visual detection equipment, wherein the detection method comprises the following steps: providing detection light, and vertically irradiating the detection light to a surface to be detected of the folding screen through an optical element; acquiring detection light rays vertically reflected by the surface to be detected of the folding screen to obtain a corresponding light source reflection image; analyzing the light source reflection image to obtain a fold degree evaluation index of the folding screen; and evaluating the folding degree of the folding screen. The invention changes the detection light path of the detection light by adopting the optical element, simulates the application scene of the human eye orthophoria folding screen, obtains the crease degree evaluation index of the folding screen matched with the human eye visual effect by carrying out image algorithm analysis on the obtained light source reflection image, and solves the problem that the crease degree measurement method of the existing folding screen is not matched with the human eye visual perception result in the orthophoria scene.

Description

Screen wrinkle degree detection method and visual detection equipment
Technical Field
The application relates to the field of display, in particular to a screen wrinkle degree detection method and visual detection equipment.
Background
The flexible folding screen can generate irreversible folds on the surface of the screen after being bent for many times or placed for a long time, the folds of the screen are mainly measured by adopting a height difference method in the current industry, and the folds of the screen are more obvious when the height difference is larger. However, the detection result obtained by the height difference measurement method is not matched with the visual observation effect of human eyes.
Therefore, a measuring method matched with the human visual perception result needs to be developed to detect the degree of the screen wrinkles of the flexible folding screen.
Disclosure of Invention
The invention provides a method and a device for detecting the wrinkle degree of a screen in an orthographic view scene, which are used for obtaining a detection result of the wrinkle degree of the screen matched with a human eye visual perception result.
In order to solve the above problems, the technical scheme provided by the invention is as follows:
the invention provides a method for detecting the wrinkle degree of a screen, which comprises the following steps:
providing detection light, and vertically irradiating the detection light to a surface to be detected of the folding screen through an optical element;
acquiring detection light rays vertically reflected by the surface to be detected of the folding screen to obtain a corresponding light source reflection image;
analyzing the light source reflection image to obtain a fold degree evaluation index of the folding screen;
and evaluating the folding degree of the folding screen.
Optionally, in some embodiments of the present invention, the optical element is a beam splitter.
Optionally, in some embodiments of the present invention, the step of vertically irradiating the surface to be measured of the folding screen with the detection light through an optical element includes:
irradiating the spectroscope with the detection light;
transmitting a part of the detection light by using the spectroscope, and reflecting the rest part of the detection light to the folding screen; and the detection light reflected to the folding screen is vertical to the surface to be detected of the folding screen.
Optionally, in some embodiments of the invention, the detection light illuminates the beam splitter at a 45 ° angle.
Optionally, in some embodiments of the present invention, the step of obtaining the detection light vertically reflected by the surface to be detected of the folding screen to obtain a corresponding light source reflection image includes:
vertically reflecting the detection light reflected to the folding screen back to the spectroscope by using the surface to be detected of the folding screen;
reflecting a part of the detection light reflected back to the spectroscope by using the spectroscope, and transmitting the rest part of the detection light;
and acquiring the detection light transmitted by the spectroscope by using a camera, and imaging according to the acquired detection light to obtain a corresponding light source reflection image.
Optionally, in some embodiments of the present invention, the light source providing the detection light is a dot light spot, a spot-dot radius size of the dot light spot is in a range of 1mm to 3mm, and a minimum distance between two adjacent dot light spots is in a range of 1mm to 3 mm.
Optionally, in some embodiments of the present invention, the step of analyzing the light source reflection image to obtain a wrinkle degree evaluation indicator of the folding screen includes:
obtaining the length-width ratio of each spot and dot in the light source reflection image by using an image algorithm; the length of the light spot round point is the maximum size of the light spot round point in the direction perpendicular to the folding screen crease, and the width of the light spot round point is the maximum size of the light spot round point in the direction parallel to the folding screen crease;
and extracting the minimum value in the length-width ratio as a wrinkle degree evaluation index of the folding screen.
Optionally, in some embodiments of the present invention, the step of analyzing the light source reflection image to obtain a wrinkle degree evaluation indicator of the folding screen includes:
obtaining the length-width ratio of each spot and dot in the light source reflection image by using an image algorithm; the length of the light spot round point is the maximum size of the light spot round point in the direction perpendicular to the folding screen crease, and the width of the light spot round point is the maximum size of the light spot round point in the direction parallel to the folding screen crease;
and calculating the average deformation length-width ratio of the deformation spot dots, wherein the average deformation length-width ratio is an evaluation index of the crease degree of the folding screen.
Optionally, in some embodiments of the present invention, the light source providing the detection light is a stripe light spot, the size of the stripe light spot ranges from (1mm × 1mm) - (3mm × 3mm), and the gap between two adjacent light spot stripes ranges from 1mm to 3 mm.
Optionally, in some embodiments of the present invention, the step of analyzing the light source reflection image to obtain a wrinkle degree evaluation indicator of the folding screen includes:
obtaining the rank of the light source reflection image by using an image algorithm, wherein the rank is a fold degree evaluation index of the folding screen; and the extending direction of the light spot stripes of the stripe light spots is parallel to the folding line direction of the folding screen.
Optionally, in some embodiments of the present invention, the step of analyzing the light source reflection image to obtain a wrinkle degree evaluation indicator of the folding screen includes:
obtaining the deformation curvature of the light spot stripe in the light source reflection image by using an image algorithm; the extending direction of the light spot stripes of the stripe light spots is perpendicular to the crease line direction of the folding screen;
and extracting the maximum value in the deformation curvatures as a crease degree evaluation index of the folding screen.
Optionally, in some embodiments of the present invention, the step of analyzing the light source reflection image to obtain a fold degree evaluation indicator of the folding screen includes:
obtaining the deformation curvature of the light spot stripe in the light source image by using an image algorithm; the extending direction of the light spot stripes of the stripe light spots is perpendicular to the crease line direction of the folding screen;
and calculating an average deformation curvature, wherein the average deformation curvature is a crease degree evaluation index of the folding screen.
Optionally, in some embodiments of the present invention, the foldable screen is in a screen-off state.
Optionally, in some embodiments of the present invention, the test environment is a dark state, the test temperature is 5 ℃ ± 3 ℃, the test humidity is 25% -85%, and the test pressure is 86kPa-106 kPa.
Correspondingly, an embodiment of the present invention further provides a visual inspection apparatus, which is used for implementing each step of the method for detecting a wrinkle degree of a screen provided by the embodiment of the present invention, and the visual inspection apparatus includes:
the object stage is used for bearing an object to be detected;
a light source for providing detection light;
the camera is arranged above the objective table and used for acquiring the detection light vertically reflected by the surface to be detected of the object;
and the optical element is used for enabling the detection light to vertically irradiate the surface to be detected of the object.
Optionally, in some embodiments of the present invention, the optical element is a beam splitter.
Optionally, in some embodiments of the present invention, the light source includes a dot light spot and a stripe light spot.
The invention provides a screen wrinkle degree detection method and visual detection equipment, wherein the detection method comprises the following steps: providing detection light, and vertically irradiating the detection light to a surface to be detected of the folding screen through an optical element; acquiring detection light rays vertically reflected by the surface to be detected of the folding screen to obtain a corresponding light source reflection image; analyzing the light source reflection image to obtain a fold degree evaluation index of the folding screen; and evaluating the folding degree of the folding screen. The invention changes the detection light path of the detection light by adopting the optical element, simulates the application scene of the human eye orthophoria folding screen, obtains the crease degree evaluation index of the folding screen matched with the human eye visual effect by carrying out image algorithm analysis on the obtained light source reflection image, and solves the problem that the crease degree measurement method of the existing folding screen is not matched with the human eye visual perception result in the orthophoria scene.
Drawings
The technical solution and other advantages of the present application will become apparent from the detailed description of the embodiments of the present application with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a visual inspection apparatus according to an embodiment of the present invention;
fig. 2 is a first flowchart of a method for detecting a degree of a screen wrinkle according to an embodiment of the present invention;
fig. 3 is a second flowchart of a method for detecting a degree of a screen wrinkle according to an embodiment of the present invention;
fig. 4 is a third flowchart of a method for detecting a degree of screen wrinkles according to an embodiment of the present invention;
fig. 5 is a fourth flowchart of a method for detecting a degree of screen wrinkles according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of a first light source according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of a first light source reflection image according to an embodiment of the present invention;
FIG. 8 is a partially enlarged schematic view of the reflected image of the light source of FIG. 7;
FIG. 9 is a schematic diagram of a second light source according to an embodiment of the present invention;
FIG. 10 is a schematic diagram of a second light source reflection image according to an embodiment of the invention;
FIG. 11 is a schematic diagram illustrating a conversion of a reflected image of a second light source according to an embodiment of the invention;
FIG. 12 is a schematic diagram of a reflected image of a third light source according to an embodiment of the invention;
fig. 13 is a fitting graph of a first wrinkle degree evaluation indicator and a human factor experiment according to an embodiment of the present invention;
FIG. 14 is a table of the variation of the first light source reflection image and the fold evaluation index with the increase of the number of folds according to the embodiment of the present invention;
FIG. 15 is a graph of a second fold-level assessment indicator fitting human experiments according to an embodiment of the present invention;
FIG. 16 is a table diagram of a second light source reflection image and a change of wrinkle evaluation index with an increase of bending times according to an embodiment of the present invention;
FIG. 17 is a graph of a third fold-level assessment indicator fitting human experiments according to an embodiment of the present invention;
fig. 18 is a fitting graph of a fourth wrinkle degree evaluation indicator provided in the embodiment of the present invention and a human factor experiment.
Detailed Description
While the embodiments and/or examples of the present invention will be described in detail and fully with reference to the specific embodiments thereof, it should be understood that the embodiments and/or examples described below are only a part of the embodiments and/or examples of the present invention and are not intended to limit the scope of the invention. All other embodiments and/or examples, which can be obtained by a person skilled in the art without making any inventive step, based on the embodiments and/or examples of the present invention, belong to the scope of protection of the present invention.
Directional terms used in the present invention, such as [ upper ], [ lower ], [ left ], [ right ], [ front ], [ rear ], [ inner ], [ outer ], [ side ], are only referring to the directions of the attached drawings. Accordingly, the directional terminology is used for the purpose of describing and understanding the invention and is in no way limiting. The terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature.
The invention provides a visual detection device and a method for detecting the wrinkle degree of a screen, which are implemented by the visual detection device and can solve the problem that the detection result is not matched with the visual observation effect of human eyes when the conventional height difference measuring method is used for detecting the wrinkle degree of the screen of a folding screen.
In one embodiment, referring to fig. 1, a visual inspection apparatus 10 according to an embodiment of the present invention includes:
an object table 110 for carrying an object 20 to be inspected;
a light source 120 for providing detection light;
the camera 130 is arranged above the object stage 110 and used for acquiring detection light rays vertically reflected by the surface to be detected of the object 20;
the optical element 140 is used for vertically irradiating the surface to be measured of the object 20 with the detection light.
In one embodiment, the optical element 140 is a beam splitter. Specifically, when the object 20 is detected, a part of the detection light emitted by the light source 120 passes through the beam splitter 140, the rest of the detection light is reflected by the beam splitter 140 to the object 20, the detection light reaching the object 20 is reflected by the surface of the object 20 to the beam splitter 140 again, and of the detection light reaching the beam splitter 140, a part of the detection light is reflected by the beam splitter 140, and the rest of the detection light passes through the beam splitter 140 to reach the camera 130.
In one embodiment, the light emitting surface of the light source 120 forms an angle of 45 ° with the beam splitter 140, and the beam splitter 140 forms an angle of 45 ° with the object stage 110. When the object 20 is detected, half of the detection light emitted by the light source 120 passes through the beam splitter 140, the other half of the detection light is reflected to the object 20 by the beam splitter 140, the detection light reaching the object 20 is reflected to the beam splitter 140 by the surface of the object 20 again, and of the detection light reaching the beam splitter 140, half of the detection light is reflected by the beam splitter 140, and the other half of the detection light passes through the beam splitter 140 and reaches the camera 130 located directly above the object 20.
In one embodiment, the beam splitter 140 is a planar beam splitter.
In one embodiment, the light source 120 includes a dot spot and a stripe spot.
In one embodiment, the detection light reaching the object 20 to be detected completely covers the object 20 to be detected.
In one embodiment, the projection of the beam splitter 140 onto the plane of the light source 120 completely covers the light source 120.
In one embodiment, the projection of the beam splitter 140 onto the object table 110 completely covers the object table 110.
The embodiment of the invention also provides a method for detecting the wrinkle degree of the screen, and the steps of the method are implemented by the visual detection device shown in fig. 1 provided by the embodiment of the invention. The test environment of the detection method provided by the embodiment of the invention is a dark state, the test temperature is 5 +/-3 ℃, the test humidity is 25-85%, and the test pressure is 86-106 kPa.
In an embodiment, referring to fig. 2, fig. 2 shows a first flowchart of a method for detecting a wrinkle degree of a screen according to an embodiment of the present invention. As shown in fig. 2, the detection method includes:
s1, providing detection light, and vertically irradiating the detection light to the surface to be detected of the folding screen through an optical element;
s2, obtaining detection light rays vertically reflected by the surface to be detected of the folding screen to obtain a corresponding light source reflection image;
s3, analyzing the light source reflection image to obtain a fold degree evaluation index of the folding screen;
and S4, evaluating the folding degree of the folding screen.
The method comprises the steps of changing a detection light path of detection light by adopting an optical element, vertically irradiating the folding screen, simulating an application scene of the folding screen viewed by human eyes, carrying out image algorithm analysis on an obtained light source reflection image to obtain a corresponding crease degree evaluation index of the folding screen, and further evaluating the crease degree of the folding screen.
In one embodiment, the optical element is a beam splitter.
Referring to fig. 1, the step of detecting in step S1 that the light beam vertically irradiates the surface to be measured of the folding screen through the optical element includes:
irradiating the spectroscope with the detection light; wherein, the detection light is totally irradiated to the spectroscope.
Transmitting a part of detection light by using a spectroscope, and reflecting the rest part of detection light to a folding screen; the detection light reflected to the folding screen is perpendicular to the surface to be detected of the folding screen.
Wherein, the folding screen is covered completely to the detection light of folding screen of reflection to guarantee to the comprehensive detection of whole folding screen surface fold degree.
In the embodiment, the irradiation path of the detection light is changed by utilizing the reflection action of the spectroscope, so that the detection light can vertically irradiate the folding screen to be detected, and the folding screen is suitable for an observer to look at the scene of the screen.
In one embodiment, the light emitting surface of the light source and the spectroscope form an included angle of 45 degrees, the folding screen to be detected and the spectroscope form an included angle of 45 degrees, and the light emitting surface of the light source and the surface to be detected of the folding screen are parallel to each other. The detection light rays enter the spectroscope at an angle of 45 degrees, wherein half of the detection light rays penetrate through the spectroscope, the other half of the detection light rays are reflected to the folding screen by the spectroscope at an angle of 45 degrees, and the detection light rays reflected to the folding screen are perpendicular to the folding screen.
In other embodiments, the included angle formed by the light emitting surface of the light source and the spectroscope may be any other angle according to actual detection requirements.
Referring to fig. 1, the step of obtaining the detection light vertically reflected by the surface to be detected of the folding screen in step S2 to obtain a corresponding light source reflection image includes:
and vertically reflecting the detection light reflected to the surface to be detected of the folding screen back to the spectroscope by using the surface to be detected of the folding screen. In the embodiment of the invention, the detection light vertically irradiates the folding screen, the surface to be detected of the folding screen vertically reflects the detection light, and the detection light reflected by the surface to be detected of the folding screen reaches the spectroscope again. The embodiment of the invention can simulate the light source to vertically irradiate the folding screen, and is suitable for observing the wrinkles of the folding screen when human eyes look at the folding screen. In the embodiment of the invention, the folding screen keeps a screen-off state so as to avoid the interference of the light of the folding screen to the test light.
And reflecting a part of the detection light reflected back to the spectroscope by using the spectroscope, and transmitting the rest part of the detection light. In the embodiment of the invention, the spectroscope is a plane spectroscope, so that the irradiation angle of the detection light passing through the spectroscope is unchanged, the spectroscope is positioned between the camera and the folding screen to be detected, and the detection light passing through the spectroscope reaches the camera.
And acquiring the detection light transmitted through the spectroscope by using a camera, and imaging according to the acquired detection light to obtain a corresponding light source reflection image.
Similarly, in the above embodiment, the light emitting surface of the light source and the spectroscope form an angle of 45 °, the surface to be measured of the folding screen and the spectroscope form an angle of 45 °, and the light emitting surface of the light source and the surface to be measured of the folding screen are parallel to each other. Half of the detection light reaching the spectroscope is reflected, and the other half of the detection light is refracted and passes through the spectroscope.
In an embodiment, please refer to fig. 3, and fig. 3 shows a second flowchart of a method for detecting a wrinkle degree of a screen according to an embodiment of the present invention. As shown in fig. 3 and fig. 1, the detection method includes:
and S31, emitting detection light by using the dot light spot as a detection light source. Wherein the detection light propagates horizontally to the left as in fig. 1. Referring to fig. 6, fig. 6 is a schematic diagram of a first light source, that is, a circular spot provided in an embodiment of the present invention, where a radius size of a spot of the circular spot is 1mm to 3mm, and a minimum distance between two adjacent spot dots is 1mm to 3 mm.
And S32, reflecting and detecting the light rays by using the spectroscope. Referring to fig. 1, the light splitter is a planar light splitter, and an included angle of 45 ° is formed between the surface of the planar light splitter and the light emitting surface of the light source, so that the detection light irradiates the surface of the planar light splitter at an incident angle of 45 °, half of the detection light irradiates the detection light of the planar light splitter, the reflection angle is 45 °, the detection light reflected by the surface of the planar light splitter propagates downwards, and the other half of the detection light is refracted by the planar light splitter and passes through the planar light splitter (not shown).
And S33, detecting light by utilizing the vertical reflection of the surface to be detected of the folding screen. Referring to fig. 1, an included angle of 45 ° is formed between the surface of the folding screen and the surface of the planar beam splitter, so that the detection light reflected by the beam splitter vertically irradiates the surface of the folding screen downwards, the detection light vertically incident is vertically reflected by the surface of the folding screen, and the detection light after vertical reflection returns to the beam splitter upwards again. In the embodiment of the invention, the folding screen keeps a screen-off state so as to avoid the interference of the light of the folding screen to the test light.
And S34, transmitting and detecting the light rays by using the spectroscope. Referring to fig. 1, in the detecting light returning to the beam splitter again, half of the detecting light is reflected by the surface of the planar beam splitter (not shown), and the other half of the detecting light is refracted by the planar beam splitter and then passes through the planar beam splitter and travels upward to the camera.
And S35, acquiring the detection light by using the camera and imaging to obtain a corresponding light source reflection image. Referring to fig. 1, the detection light transmitted by the beam splitter reaches and is captured by the camera to form a light source reflection image reflected by the folding screen. Referring to fig. 7 and 8, fig. 7 is a schematic view illustrating a first light source reflection image provided by an embodiment of the present invention, and fig. 8 is a partially enlarged schematic view illustrating the light source reflection image in fig. 7, where the length of a spot dot is the maximum dimension of the spot dot in a direction perpendicular to a folding screen fold line X, and the width of the spot dot is the maximum dimension of the spot dot in a direction parallel to the folding screen fold line Y, as shown in fig. 8, the length of the spot dot is denoted by h, and the width of the spot dot is denoted by w, and then the aspect ratio of the spot dot is h/w. As shown in fig. 7 and 8, within the fold region 701 of the folded screen, the lengths of the spot dots are compressed in a direction X perpendicular to the fold of the folded screen.
In one embodiment, S361, obtaining the aspect ratios of the light spot dots in the light source reflection image by using an image algorithm, and taking the minimum value of the aspect ratios as the crease degree evaluation index of the folding screen. The minimum length-width ratio of the spot dots is smaller, the folding degree of the folding screen is larger, the minimum length-width ratio of the spot dots is larger, and the folding degree of the folding screen is smaller.
Referring to fig. 13, fig. 13 is a graph showing the aspect ratio of the spot dots according to the present embodiment as a fit to a human experiment. Therein, plan toSum of R2The fitting value is close to 1 when 0.9014, which proves that the detection method of the screen wrinkle degree provided by the embodiment has good matching property with the visual effect of human eyes.
And S371, evaluating the wrinkle degree of the folding screen. Referring to fig. 13, when the physical human factor score is 0, the folding screen has no crease; when the physical human score is 0-3 (excluding 0), slight creases exist in the folded screen; when the physical human factor score is 3-6 (excluding 3), the folding screen has obvious crease; when the physical human score is 6-10 (excluding 6), the folded screen has severe creases.
According to the embodiment, the dot light spots are used as the detection light source, the image algorithm analysis is carried out on the light source reflection image reflected by the folding screen, and the minimum length-width ratio of the dot light spots serving as the fold degree evaluation index matched with the visual effect of human eyes is obtained. In the embodiment, the light path of the detection light is changed through the spectroscope, so that the detection light is vertically incident and reflected relative to the folding screen, and the folding screen is suitable for the application scene of the human eye orthographic view folding screen.
In another embodiment, in S362, an image algorithm is used to obtain the aspect ratio of the light spot dots in the light source reflection image and calculate the average deformation aspect ratio of the deformed light spot dots, and the average deformation aspect ratio is used as the crease degree evaluation index of the folding screen. Wherein, the deformed spot dots are spot dots with aspect ratios different from 1, and the average deformed aspect ratio is the average value of the aspect ratios of the deformed spot dots. Wherein the smaller the value of the average deformation aspect ratio, the greater the degree of folding of the folding screen, and the greater the value of the average deformation aspect ratio, the lesser the degree of folding of the folding screen.
Referring to fig. 14, fig. 14 is a table showing the variation of the light source reflection image and the average aspect ratio of the deformation with the increase of the number of bending times according to the present embodiment. The average deformation length-width ratio value is gradually reduced along with the increase of the bending times, and the detection method for the screen crease degree provided by the embodiment is proved to have good matching performance with the visual effect of human eyes.
And S372, evaluating the wrinkle degree of the folding screen.
According to the embodiment, the dot light spots are used as the detection light source, the image algorithm analysis is carried out on the light source reflection image reflected by the folding screen, and the average deformation length-width ratio of the dot light spots serving as the fold degree evaluation index matched with the visual effect of human eyes is obtained. In the embodiment, the light path of the detection light is changed through the spectroscope, so that the detection light is vertically incident and reflected relative to the folding screen, and the folding screen is suitable for the application scene of the human eye orthographic view folding screen.
In another embodiment, referring to fig. 4, fig. 4 shows a third flowchart of a method for detecting a degree of screen wrinkles according to an embodiment of the present invention. As shown in fig. 4 and fig. 1, the detection method includes:
s41, emitting detection light by using the stripe light spot as a detection light source; the extending direction of the light spot stripes of the stripe light spots is parallel to the folding line direction of the folding screen. Referring to fig. 9, fig. 9 is a schematic diagram of a second light source provided in an embodiment of the present invention, that is, a schematic diagram of stripe light spots, in an embodiment of the present invention, the light spot stripe radius size range of the stripe light spots is (1mm × 1mm) - (3mm × 3mm), and a gap between the light spot stripes is 1mm-3 mm.
And S42, reflecting and detecting the light rays by using the spectroscope. Referring to fig. 1, the light splitter is a planar light splitter, and an included angle of 45 ° is formed between the surface of the planar light splitter and the light emitting surface of the light source, so that the detection light irradiates the surface of the planar light splitter at an incident angle of 45 °, half of the detection light irradiates the detection light of the planar light splitter, the reflection angle is 45 °, the detection light reflected by the surface of the planar light splitter propagates downwards, and the other half of the detection light is refracted by the planar light splitter and passes through the planar light splitter (not shown).
And S43, detecting light by utilizing the vertical reflection of the surface to be detected of the folding screen. Referring to fig. 1, an included angle of 45 ° is formed between the surface of the folding screen and the surface of the planar beam splitter, so that the detection light reflected by the beam splitter vertically irradiates the surface of the folding screen downwards, the detection light vertically incident is vertically reflected by the surface of the folding screen, and the detection light after vertical reflection returns to the beam splitter upwards again. In the embodiment of the invention, when the detection light irradiates the folding screen, the extending direction of the light spot stripe is parallel to the folding line direction of the folding screen. In the embodiment of the invention, the folding screen keeps a screen-off state so as to avoid the interference of the light of the folding screen to the test light.
And S44, transmitting and detecting the light rays by using the spectroscope. Referring to fig. 1, in the detecting light returning to the beam splitter again, half of the detecting light is reflected by the surface of the planar beam splitter (not shown), and the other half of the detecting light is refracted by the planar beam splitter and then passes through the planar beam splitter and travels upward to the camera.
And S45, acquiring the detection light by using the camera and imaging to obtain a corresponding light source reflection image. Referring to fig. 1, the detection light transmitted by the beam splitter reaches and is captured by the camera to form a light source reflection image reflected by the folding screen. Referring to fig. 10, fig. 10 is a schematic diagram illustrating a reflection image of a second light source according to an embodiment of the present invention, as shown in fig. 10, in a folding area 101 of a folding screen, in a direction perpendicular to a folding line X of the folding screen, a size of a speckle pattern is deformed, and parameters of each speckle pattern tend to be different.
And S46, obtaining the rank of the light source reflection image by using an image algorithm, wherein the rank is a fold degree evaluation index of the folding screen. The rank represents the information enrichment degree of the light spot stripes, the folding screen crease depth is increased along with the increase of the folding times of the folding screen, the deformation degree of the light spot stripes tends to be similar, and parameters after the deformation of the light spot stripes tend to be the same. Therefore, the smaller the value of the rank is, the larger the folding screen is wrinkled, and the larger the value of the rank is, the smaller the folding screen is wrinkled. Referring to fig. 11, fig. 11 is a schematic diagram illustrating a conversion of a second light source reflection image, and as shown in fig. 11, the rank of the light source reflection image is calculated by sequentially performing image conversion such as raster image, grayscale image, image binarization, image inversion, Laplacian operator, raster deformation, and the like, and a rank operation method.
Referring to fig. 15 and 16, fig. 15 shows a fitting graph of the rank of the speckle pattern and the human factor experiment in the embodiment, wherein the fitting value R is2The fitting value is close to 1 when being equal to 0.92, which proves that the detection method for the degree of screen wrinkle provided by the embodiment has good match with the visual effect of human eyesThe compatibility is good. Fig. 16 is a table diagram showing the light source reflection image and the change of rank with the increase of the number of times of bending in the present embodiment. The numerical value of the rank is gradually reduced along with the increase of the bending times, and the detection method for the screen crease degree provided by the embodiment is further proved to have good matching performance with the visual effect of human eyes.
And S47, evaluating the folding degree of the folding screen. Referring to fig. 15, when the physical human factor score is 0, the folding screen has no crease; when the physical human score is 0-3 (excluding 0), slight creases exist in the folded screen; when the physical human factor score is 3-6 (excluding 3), the folding screen has obvious crease; when the physical human score is 6-10 (excluding 6), the folded screen has severe creases.
In the embodiment, the stripe light spot is used as a detection light source, the extending direction of the light spot stripe of the stripe light spot is parallel to the folding line direction of the folding screen, and the image algorithm analysis is performed on the light source reflection image reflected by the folding screen to obtain the wrinkle degree evaluation index matched with the human eye visual effect, namely the rank of the light spot stripe. Similarly, in the embodiment, the light path of the detection light is changed by the spectroscope, so that the detection light is vertically incident and reflected relative to the folding screen, and the method is suitable for the application scene of the human eye orthographic view of the folding screen.
In yet another embodiment, referring to fig. 5, fig. 5 shows a third flowchart of a method for detecting a wrinkle degree of a screen according to an embodiment of the present invention. As shown in fig. 5 and fig. 1, the detection method includes:
s51, emitting detection light by using the stripe light spot as a detection light source; the extending direction of the light spot stripes of the stripe light spots is perpendicular to the folding line direction of the folding screen. Referring to fig. 9, fig. 9 is a schematic diagram of a second light source provided in an embodiment of the present invention, that is, a schematic diagram of stripe light spots, in an embodiment of the present invention, the light spot stripe radius size range of the stripe light spots is (1mm × 1mm) - (3mm × 3mm), and a gap between the light spot stripes is 1mm-3 mm.
And S52, reflecting and detecting the light rays by using the spectroscope. Referring to fig. 1, the light splitter is a planar light splitter, and an included angle of 45 ° is formed between the surface of the planar light splitter and the light emitting surface of the light source, so that the detection light irradiates the surface of the planar light splitter at an incident angle of 45 °, half of the detection light irradiates the detection light of the planar light splitter, the reflection angle is 45 °, the detection light reflected by the surface of the planar light splitter propagates downwards, and the other half of the detection light is refracted by the planar light splitter and passes through the planar light splitter (not shown).
And S53, detecting light by utilizing the vertical reflection of the surface to be detected of the folding screen. Referring to fig. 1, an included angle of 45 ° is formed between the surface of the folding screen and the surface of the planar beam splitter, so that the detection light reflected by the beam splitter vertically irradiates the surface of the folding screen downwards, the detection light vertically incident is vertically reflected by the surface of the folding screen, and the detection light after vertical reflection returns to the beam splitter upwards again. In the embodiment of the invention, when the detection light irradiates the folding screen, the extending direction of the light spot stripe is parallel to the folding line direction of the folding screen. In the embodiment of the invention, the folding screen keeps a screen-off state so as to avoid the interference of the light of the folding screen to the test light.
And S54, transmitting and detecting the light rays by using the spectroscope. Referring to fig. 1, in the detecting light returning to the beam splitter again, half of the detecting light is reflected by the surface of the planar beam splitter (not shown), and the other half of the detecting light is refracted by the planar beam splitter and then passes through the planar beam splitter and travels upward to the camera.
And S55, acquiring the detection light by using the camera and imaging to obtain a corresponding light source reflection image. Referring to fig. 1, the detection light transmitted by the beam splitter reaches and is captured by the camera to form a light source reflection image reflected by the folding screen. Referring to fig. 12, fig. 12 is a schematic diagram illustrating a reflection image of a third light source according to an embodiment of the present invention, and as shown in fig. 12, in a folding area 121 of a folding screen, a speckle pattern is curved and deformed.
In one embodiment, S561, obtaining deformation curvatures of the light spot stripes in the light source reflection image by using an image algorithm, and taking a maximum value of the deformation curvatures as a crease degree evaluation index of the folding screen. Specifically, the deformation curvature of the light spot stripe is calculated through an arc differential algorithm. The deformation curvature of the light spot stripe is the rotation rate of the tangential direction angle of a certain point on the light spot stripe to the arc length, the degree of deviation of a light spot stripe curve from a straight line is indicated, and the numerical value of the deformation curvature of the light spot stripe curve at the certain point is the numerical value of the bending degree of the light spot stripe curve at the certain point. The larger the value of the maximum deformation curvature is, the larger the folding degree of the folding screen is, and the smaller the value of the maximum deformation curvature is, the smaller the folding degree of the folding screen is.
Referring to fig. 17, fig. 17 is a graph showing a fitting graph of the maximum distortion curvature of the speckle pattern and the human factor experiment according to the embodiment, wherein the fitting value R is2The fitting value is close to 1, 0.9082, which proves that the method for detecting the degree of screen fold provided by the present embodiment has good matching with the visual effect of human eyes.
In the embodiment, the stripe light spot is used as a detection light source, the extending direction of the light spot stripe of the stripe light spot is vertical to the folding line direction of the folding screen, and the image algorithm analysis is carried out on the light source reflection image reflected by the folding screen to obtain the maximum deformation curvature of the light spot stripe, which is the wrinkle degree evaluation index matched with the visual effect of human eyes. Similarly, in the embodiment, the light path of the detection light is changed by the spectroscope, so that the detection light is vertically incident and reflected relative to the folding screen, and the method is suitable for the application scene of the human eye orthographic view of the folding screen.
And S571, evaluating the wrinkle degree of the folding screen. Referring to fig. 17, when the physical human factor score is 0, the folding screen has no crease; when the physical human score is 0-3 (excluding 0), slight creases exist in the folded screen; when the physical human factor score is 3-6 (excluding 3), the folding screen has obvious crease; when the physical human score is 6-10 (excluding 6), the folded screen has severe creases.
In one embodiment, S562, obtaining a deformation curvature of the light spot stripe in the light source reflection image by using an image algorithm and calculating an average deformation curvature, and using the average deformation curvature as a crease degree evaluation index of the folding screen. Wherein the larger the value of the average deformation curvature is, the larger the degree of folding of the folding screen is, and the smaller the value of the average deformation curvature is, the smaller the degree of folding of the folding screen is.
Referring to FIG. 18, FIG. 18 shows a view of the present embodimentAnd (3) fitting the average deformation curvature of the light spot stripe to a human factor experiment. Wherein the fitting value R2The fitting value is close to 1, 0.9294, which proves that the method for detecting the degree of screen fold provided by the present embodiment has good matching with the visual effect of human eyes.
And S572, evaluating the wrinkle degree of the folding screen. Referring to fig. 18, when the physical human factor score is 0, the folding screen has no crease; when the physical human score is 0-3 (excluding 0), slight creases exist in the folded screen; when the physical human factor score is 3-6 (excluding 3), the folding screen has obvious crease; when the physical human score is 6-10 (excluding 6), the folded screen has severe creases.
In the embodiment, the stripe light spot is used as a detection light source, the extending direction of the light spot stripe of the stripe light spot is vertical to the folding line direction of the folding screen, and the image algorithm analysis is carried out on the light source reflection image reflected by the folding screen to obtain the average deformation curvature of the light spot stripe, which is the wrinkle degree evaluation index matched with the visual effect of human eyes. Similarly, in the embodiment, the light path of the detection light is changed by the spectroscope, so that the detection light is vertically incident and reflected relative to the folding screen, and the method is suitable for the application scene of the human eye orthographic view of the folding screen.
In summary, an embodiment of the present invention provides a method for detecting a wrinkle degree of a screen and a visual detection device, where the method includes: providing detection light, and vertically irradiating the detection light to a surface to be detected of the folding screen through an optical element; acquiring detection light vertically reflected by a to-be-detected surface of the folding screen to obtain a corresponding light source reflection image; analyzing the light source reflection image to obtain a fold degree evaluation index of the folding screen; the degree of folding of the folded screen is evaluated. The method and the device have the advantages that the optical element is adopted to change the detection light path of the detection light, the application scene of the human eye orthophoria folding screen is simulated, the obtained light source reflection image is subjected to image algorithm analysis, the corresponding crease degree evaluation index of the folding screen is obtained, and then the crease degree of the folding screen is evaluated.
The method for detecting the degree of wrinkle of the screen and the visual detection device provided by the embodiment of the invention are described in detail above, a specific example is applied in the text to explain the principle and the embodiment of the invention, and the description of the above embodiment is only used to help understanding the method and the core idea of the invention; meanwhile, for those skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.

Claims (17)

1. A method for detecting the wrinkle degree of a screen is characterized by comprising the following steps:
providing detection light, and vertically irradiating the detection light to a surface to be detected of the folding screen through an optical element;
acquiring detection light rays vertically reflected by the surface to be detected of the folding screen to obtain a corresponding light source reflection image;
analyzing the light source reflection image to obtain a fold degree evaluation index of the folding screen;
and evaluating the folding degree of the folding screen.
2. The method for detecting the degree of screen wrinkles as claimed in claim 1, wherein said optical element is a spectroscope.
3. The method for detecting the degree of screen wrinkles as claimed in claim 2, wherein said step of vertically irradiating the surface to be measured of the folding screen with the detection light through the optical element comprises:
irradiating the spectroscope with the detection light;
transmitting a part of the detection light by using the spectroscope, and reflecting the rest part of the detection light to the folding screen; and the detection light reflected to the folding screen is vertical to the surface to be detected of the folding screen.
4. The method of detecting a degree of screen wrinkles as claimed in claim 3, wherein said detection light irradiates said beam splitter at an angle of 45 °.
5. The method for detecting the degree of screen wrinkles as claimed in claim 3, wherein the step of obtaining the detection light reflected perpendicularly by the surface to be detected of the folding screen to obtain the corresponding light source reflection image comprises:
vertically reflecting the detection light reflected to the folding screen back to the spectroscope by using the surface to be detected of the folding screen;
reflecting a part of the detection light reflected back to the spectroscope by using the spectroscope, and transmitting the rest part of the detection light;
and acquiring the detection light transmitted by the spectroscope by using a camera, and imaging according to the acquired detection light to obtain a corresponding light source reflection image.
6. The method for detecting the degree of screen wrinkles as claimed in claim 1, wherein the light source for providing the detection light is a dot spot, the spot radius size of the dot spot is in the range of 1mm to 3mm, and the minimum distance between two adjacent dot spots is in the range of 1mm to 3 mm.
7. The method for detecting the wrinkle degree of the screen as claimed in claim 6, wherein the step of analyzing the light source reflection image to obtain the wrinkle degree evaluation index of the folded screen comprises:
obtaining the length-width ratio of each spot and dot in the light source reflection image by using an image algorithm; the length of the light spot round point is the maximum size of the light spot round point in the direction perpendicular to the folding screen crease, and the width of the light spot round point is the maximum size of the light spot round point in the direction parallel to the folding screen crease;
and extracting the minimum value in the length-width ratio as a wrinkle degree evaluation index of the folding screen.
8. The method for detecting the wrinkle degree of the screen as claimed in claim 6, wherein the step of analyzing the light source reflection image to obtain the wrinkle degree evaluation index of the folded screen comprises:
obtaining the length-width ratio of each spot and dot in the light source reflection image by using an image algorithm; the length of the light spot round point is the maximum size of the light spot round point in the direction perpendicular to the folding screen crease, and the width of the light spot round point is the maximum size of the light spot round point in the direction parallel to the folding screen crease;
and calculating the average deformation length-width ratio of the deformation spot dots, wherein the average deformation length-width ratio is an evaluation index of the crease degree of the folding screen.
9. The method as claimed in claim 1, wherein the light source for detecting the light is a stripe spot, and the size of the stripe spot is (1mm x 1mm) -
(3mm x 3mm) and the gap between two adjacent spot stripes is 1mm-3 mm.
10. The method for detecting the wrinkle degree of the screen as claimed in claim 9, wherein the step of analyzing the light source reflection image to obtain the wrinkle degree evaluation index of the folded screen comprises:
obtaining the rank of the light source reflection image by using an image algorithm, wherein the rank is a fold degree evaluation index of the folding screen; and the extending direction of the light spot stripes of the stripe light spots is parallel to the folding line direction of the folding screen.
11. The method for detecting the wrinkle degree of the screen as claimed in claim 9, wherein the step of analyzing the light source reflection image to obtain the wrinkle degree evaluation index of the folded screen comprises:
obtaining the deformation curvature of the light spot stripe in the light source reflection image by using an image algorithm; the extending direction of the light spot stripes of the stripe light spots is perpendicular to the crease line direction of the folding screen;
and extracting the maximum value in the deformation curvatures as a crease degree evaluation index of the folding screen.
12. The method for detecting the degree of folding of a screen according to claim 9, wherein the step of analyzing the light source reflection image to obtain an evaluation index of the degree of folding of the folding screen includes:
obtaining the deformation curvature of the light spot stripe in the light source image by using an image algorithm; the extending direction of the light spot stripes of the stripe light spots is perpendicular to the crease line direction of the folding screen;
and calculating an average deformation curvature, wherein the average deformation curvature is a crease degree evaluation index of the folding screen.
13. The method for detecting the degree of screen wrinkles as claimed in claim 1, wherein said folding screen is in a screen-off state.
14. The method of claim 1, wherein the test environment is a dark state, the test temperature is 5 ℃ ± 3 ℃, the test humidity is 25% to 85%, and the test pressure is 86kPa to 106 kPa.
15. A visual inspection apparatus for carrying out the respective steps of the method for detecting a degree of screen wrinkles according to any one of claims 1 to 13, comprising:
the object stage is used for bearing an object to be detected;
a light source for providing detection light;
the camera is arranged above the objective table and used for acquiring the detection light vertically reflected by the surface to be detected of the object;
and the optical element is used for enabling the detection light to vertically irradiate the surface to be detected of the object.
16. The visual inspection device of claim 15, wherein the optical element is a beam splitter.
17. The visual inspection device of claim 15, wherein the light source includes a dot spot and a stripe spot.
CN202111360140.6A 2021-11-17 2021-11-17 Screen wrinkle degree detection method and visual detection equipment Pending CN113899754A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN202111360140.6A CN113899754A (en) 2021-11-17 2021-11-17 Screen wrinkle degree detection method and visual detection equipment
PCT/CN2021/133129 WO2023087356A1 (en) 2021-11-17 2021-11-25 Screen wrinkle degree inspection method and visual inspection device
US17/621,241 US20240027362A1 (en) 2021-11-17 2021-11-25 Detection method of wrinkle degree of screen and visual detection device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111360140.6A CN113899754A (en) 2021-11-17 2021-11-17 Screen wrinkle degree detection method and visual detection equipment

Publications (1)

Publication Number Publication Date
CN113899754A true CN113899754A (en) 2022-01-07

Family

ID=79194340

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202111360140.6A Pending CN113899754A (en) 2021-11-17 2021-11-17 Screen wrinkle degree detection method and visual detection equipment

Country Status (3)

Country Link
US (1) US20240027362A1 (en)
CN (1) CN113899754A (en)
WO (1) WO2023087356A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114608818A (en) * 2022-03-01 2022-06-10 深圳市华星光电半导体显示技术有限公司 Folding screen crease detection device and method thereof
CN115994940A (en) * 2022-11-09 2023-04-21 荣耀终端有限公司 Crease degree testing method and equipment for folding screen equipment and storage medium

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005337857A (en) * 2004-05-26 2005-12-08 Toray Ind Inc Surface unevenness inspection method and inspection apparatus
TW200907330A (en) * 2007-08-09 2009-02-16 Utechzone Co Ltd Coaxial lighting surface defect inspection device and method thereof
US20120127480A1 (en) * 2009-07-24 2012-05-24 Bobst Sa Topography device for a surface of a substrate
CN110208287A (en) * 2019-07-03 2019-09-06 东莞创视自动化科技有限公司 OLED screen polarized light type coaxial configuration light detection method and OLED screen polarisation detection device
US20190287237A1 (en) * 2016-12-01 2019-09-19 Autaza Tecnologia LTDA-EPP Method and system for automatic quality inspection of materials and virtual material surfaces
CN110736751A (en) * 2019-11-06 2020-01-31 上海御微半导体技术有限公司 surface defect detection method and device
US20200158497A1 (en) * 2017-05-24 2020-05-21 Centre National De La Recherche Scientifique (Cnrs) Method for measuring the curvature of a reflective surface and associated optical device
US20200184620A1 (en) * 2018-12-10 2020-06-11 Usnr, Llc Wetwood detection in sawn or planed wood products
CN111487316A (en) * 2020-05-26 2020-08-04 广州多浦乐电子科技股份有限公司 Folding screen crease detection device and method

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101282957B1 (en) * 2010-10-29 2013-07-08 엘지디스플레이 주식회사 Method and apparatus for measuring optical of stereoscopic display device
US20220397675A1 (en) * 2019-07-09 2022-12-15 Sony Semiconductor Solutions Corporation Imaging systems, devices and methods
KR102430925B1 (en) * 2020-07-31 2022-08-09 서울대학교산학협력단 Thickness and property measurement system of thin film using spatial light modulator
CN112086032A (en) * 2020-10-13 2020-12-15 联想(北京)有限公司 Display device and computing device
CN112212812B (en) * 2020-10-13 2023-05-02 联想(北京)有限公司 Detection device and detection method
CN113299213B (en) * 2021-06-17 2022-08-05 合肥维信诺科技有限公司 Crease detection method and device

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005337857A (en) * 2004-05-26 2005-12-08 Toray Ind Inc Surface unevenness inspection method and inspection apparatus
TW200907330A (en) * 2007-08-09 2009-02-16 Utechzone Co Ltd Coaxial lighting surface defect inspection device and method thereof
US20120127480A1 (en) * 2009-07-24 2012-05-24 Bobst Sa Topography device for a surface of a substrate
US20190287237A1 (en) * 2016-12-01 2019-09-19 Autaza Tecnologia LTDA-EPP Method and system for automatic quality inspection of materials and virtual material surfaces
US20200158497A1 (en) * 2017-05-24 2020-05-21 Centre National De La Recherche Scientifique (Cnrs) Method for measuring the curvature of a reflective surface and associated optical device
US20200184620A1 (en) * 2018-12-10 2020-06-11 Usnr, Llc Wetwood detection in sawn or planed wood products
CN110208287A (en) * 2019-07-03 2019-09-06 东莞创视自动化科技有限公司 OLED screen polarized light type coaxial configuration light detection method and OLED screen polarisation detection device
CN110736751A (en) * 2019-11-06 2020-01-31 上海御微半导体技术有限公司 surface defect detection method and device
CN111487316A (en) * 2020-05-26 2020-08-04 广州多浦乐电子科技股份有限公司 Folding screen crease detection device and method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114608818A (en) * 2022-03-01 2022-06-10 深圳市华星光电半导体显示技术有限公司 Folding screen crease detection device and method thereof
CN114608818B (en) * 2022-03-01 2023-12-01 深圳市华星光电半导体显示技术有限公司 Folding screen crease detection device and method thereof
CN115994940A (en) * 2022-11-09 2023-04-21 荣耀终端有限公司 Crease degree testing method and equipment for folding screen equipment and storage medium
CN115994940B (en) * 2022-11-09 2023-12-08 荣耀终端有限公司 Crease degree testing method and equipment for folding screen equipment and storage medium

Also Published As

Publication number Publication date
WO2023087356A1 (en) 2023-05-25
US20240027362A1 (en) 2024-01-25

Similar Documents

Publication Publication Date Title
CN113899754A (en) Screen wrinkle degree detection method and visual detection equipment
JP6447637B2 (en) Surface defect detection apparatus, surface defect detection method, and steel material manufacturing method
JP6394514B2 (en) Surface defect detection method, surface defect detection apparatus, and steel material manufacturing method
US8462356B2 (en) Apparatus and method for observing the surface of a sample
TW201033602A (en) Defect inspection device for formed sheet
WO2008146764A1 (en) Shape evaluation method, shape evaluation device, and 3d inspection device
US7601978B2 (en) Fabric wrinkle evaluation
CN105745523A (en) Systems and methods for inspecting wound optical fiber
KR20090113910A (en) A method for quantifying defects in a transparent substrate
Koshti Assessing visual and system flaw detectability in nondestructive evaluation
JPWO2020165976A1 (en) Simulation equipment and simulation method
Lee et al. Machine vision system for curved surface inspection
JP5197600B2 (en) Method for non-contact measurement of a two-layer three-dimensional object with a single viewpoint optical ombre scope
Nhung et al. Development of 3D breast measurement system using structured light for bra design
JP5251189B2 (en) Line-shaped object detection apparatus and line-shaped object detection method used for the line-shaped object detection apparatus
CN113899755A (en) Screen crease degree detection method and visual detection equipment
JP7207386B2 (en) Surface defect inspection method, surface defect inspection device, steel sheet manufacturing method, steel sheet quality control method, and steel sheet manufacturing equipment
JP2013037009A (en) Contour line extraction method, contour line extraction program and area measuring method
JP2009014519A (en) Area measuring method and area measuring program
KR100341867B1 (en) Automatic Evaluation System of Fabric Wrinkles and Seam Puckers and Their Method
CN107064142A (en) A kind of image measuring method of wrinkle recovery angle of woven fabrics using viscoelasticity theory
KR102148817B1 (en) System and method for detecting bad contact lens
CN113570578A (en) Lens ghost phenomenon detection method and device
JP2017181136A (en) Surface defect detection method and surface defect detection device
JP2007506072A (en) Sheet surface analyzer and analysis method

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication

Application publication date: 20220107

RJ01 Rejection of invention patent application after publication